I want to build my game for mac and ios .I have done for windows and android on windows OS but don’t know for ios.If anyone knows please explain from the scratch with all the requirements from system to environment.
Thanx in advance.
Hi,
I can’t give you a brief details but a small step up might be usefull. 
System - OS X Mac an variant will do as long as it is able to run XCode.
Softwares - XCode and Cocos2d-x setup that’s fairly simple just follow the installation docs.
If your game is already working for other platform it will be easy to port it to iOs and Mac provided you are not doing much platform specific.
To add platform just do a quick forum search and you will understand the procedure.
What’s more try you setup now… 
thanx